U.S. federal authorities cannot extradite the founder of the Megaupload online file-sharing site without evidence supporting charges of copyright breaches and internet piracy, a New Zealand court ruled Thursday, Reuters reports.

“Without access to materials relevant to the extradition hearing phase, the person sought will be significantly constrained in his or her ability to participate in the hearing,” Justice Helen Winkelmann said in a written judgment.

The FBI claims Kim Dotcom, founder of Megaupload, netted millions of dollars by copying movies and music without authorization.

Dotcom was arrested by New Zealand authorities at his rented house near Auckland in late January.

A leak to the media prompted an immigration judge to grant asylum to President Obama’s aunt Zeituni Onyango who lives in Boston public housing, the Boston Globe reported.

The paper reported that the judge, Leonard I. Shapiro, ruled the asylum was granted because of an anonymous federal official in the Bush administration, who leaked information about her immigration status, and consequently exposed her to potentially more threats in her native Kenya, the Globe reported, citing the court ruling.

Onyango was granted asylum in May, but the reasons why were not released, triggering speculation, particularly among conservative Republicans, that she got favorable treatment because of her relationship with the president. Her two previous requests were rejected.

Immigration Judge Shapiro, a Republican appointee, harshly wrote in his ruling that a Bush administration official leaked the information to the Associated Press, which threw her into the spotlight in a “highly publicized and highly politicized manner’’ days before the November 2008, the Globe reported.

“Moreover,’’ he wrote, according to the Globe, that “the disclosure . . . was a reckless and illegal violation of her right to privacy which has exposed her to great risk.’